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在动物和人体通过神经系统的调节教学中涉及到电表指针偏转问题,而教材没有明确说明用的是电流表、电压表还是电流计,且插图中的电流方向与电表指针偏转方向相同,而物理学中常用的电表指针偏转方向与电流方向一般是相同的,从而造成教师在教学中感到困惑,不知如何教学才好。在教学中可结合教材上神经表面电位差的实验示意图及相关例题,找出电表指针偏转方向与电流方向之间的规律,这样就能对教师教学提供帮助。
In animal and human body through the regulation of the nervous system involves the meter pointer deflection problem, but the text does not explicitly indicate the use of ammeter, voltmeter or ammeter, and the direction of current in the illustration and meter pointer deflection in the same direction, and physics Commonly used meter pointer deflection direction and current direction is generally the same, resulting in teachers in teaching confused, I do not know how to teach it. In teaching can be combined with textbooks on the neural surface potential difference experiment diagram and related examples to find the meter pointer deflection direction and the current direction of the law, so that teachers can help teaching.